Answer: 3 mi/h
Step-by-step explanation:
Here we have to find the speed [tex]V[/tex] at which Sarah walks to school, knowing the distance [tex]d[/tex] she has walked and the time [tex]t[/tex] she expends.
So, in this case we can use the following equation:
[tex]V=\frac{d}{t}[/tex]
Where:
[tex]d=1.5 mi[/tex]
[tex]t=30 min \frac{1 h}{60 min}=0.5 h[/tex]
Solving:
[tex]V=\frac{1.5 mi}{0.5 h}[/tex]
[tex]V=3 mi/h[/tex] This is Sarah's speed
